2656289 has 2 divisors, whose sum is σ = 2656290. Its totient is φ = 2656288.

The previous prime is 2656273. The next prime is 2656309. The reversal of 2656289 is 9826562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 966289 = 1300^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656289 - 2⁴ = 2656273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2656229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328144 + 1328145.

It is an arithmetic number, because the mean of its divisors is an integer number (1328145).

2^2656289 is an apocalyptic number.

It is an amenable number.

2656289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656289 is an equidigital number, since it uses as much as digits as its factorization.

2656289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 2656289 is about 1629.8125659106. The cubic root of 2656289 is about 138.4921342090.

The spelling of 2656289 in words is "two million, six hundred fifty-six thousand, two hundred eighty-nine".